Perhaps it was corrupted so best to uninstall.
Select the hot corner (Start button).
Right-click the icon for the application you want to remove.
Or in desktop go to Control Panel and Programs > Uninstall a Program
How to open Control Panel in Windows 8: http://www.eightforums.com/tutorials/2627-control-panel-open-windows-8-a.html
Download the MCPR tool:
Download the removal tool from: http://download.mcafee.com/products/licensed/cust_support_patches/MCPR.exe.
Click Save and save the file to a folder on your computer.
Install the tool:
Navigate to the folder where the file was saved.
Ensure all McAfee windows are closed.
Double-click MCPR.exe to run the removal tool.
Reboot and reinstall from your online account.